Sonde Maintenance and Care March 2014

Report
Sonde Maintenance and Care
10th Annual Red
River Basin Water
Quality
Monitoring Training
March 5, 2014
Bruce Paakh, MPCA
Sonde Maintenance and Care
March 2014
Introduction
The Red River Basin Monitoring Advisory
Committee system to assure quality sonde
data includes:
1. Well maintained equipment. Annual “Sonde
CheckUp” service for all basin sondes. Assures
the sondes are upgraded (both in software &
hardware) each year prior to use.
2. Trained field technicians that properly
maintain, calibrate, and use sondes.
Sonde Maintenance and Care
March 2014
Sonde Check- Up Day January 2010
Sonde Maintenance and Care
March 2014
Introduction cont.
• Additional training is available each year in
Brainerd by YSI reps for those who want it.
• It covers the details of probe replacement,
diagnosing problems, probe mechanics.
• Our goal is to provide you what you need to
produce reliable data without the extra stuff
you won’t need with our Red River Basin
system. (KISS principle)
Sonde Maintenance and Care
March 2014
You Need to Know How To:
•
•
•
•
Change a DO Membrane
Change Batteries in the 650 Display
Calibrate and Use the Sonde
Maintain and Care for the Sonde
Sonde Maintenance and Care
March 2014
Basics
• Don’t collect data with a sonde that isn’t
properly calibrated. We don’t want poor
quality data in our datasets.
• Don’t use calibration solution that is
expired or has been frozen. Use for rinse.
• Calibration standard is only good for 30
days once it is opened. Record date when
opened on bottle & initial.
Sonde Maintenance and Care
March 2014
Help - Only a Call Away
• A primary reason the MPCA went with YSI when
selecting a vendor for WQ sondes was their service.
• If you need to call YSI, DO IT. They are very good.
YSI Technical Service – 1-800-897-4151
• You can also call Danni, Wayne, Evelyn, Asher, Joe or
myself if you need help.
Danni Halvorson 218-280-0515 (c)
Bruce Paakh 218-849-4886 (c)
Sonde Maintenance and Care
March 2014
Care of Sonde - Basics
• Keep calibration cup or storage bottle on the
sonde when not in use. Don’t let probes dry
out. Keep at least a 1/2 inch of water in the
cal cup of all YSI sondes.
• 600 series If you lose or tear the orange oring on the storage bottle cap, get a
replacement. We have spares & hardware
stores have o-rings.
Sonde Maintenance and Care
March 2014
Care continued
• Store sonde away from temp extremes.
Freezing will break pH bulb. Don’t leave in
vehicle overnight during early spring & late
fall. Don’t store in hot vehicle during summer.
• Handle it with care. It will take a beating over
time. Being careless can shorten it’s lifespan.
• Don’t try to take a sonde apart. They are
factory sealed and not repairable by us.
Sonde Maintenance and Care
March 2014
Care continued
• Water shouldn’t to get into probe ports or
cable connections. Make sure cable is on
tight. Should be able to see only 2 threads
on sonde when cable is screwed on tight.
• Moisture in a probe port is the most
common reason for trouble with a probe.
• Cable connector port should be covered at all
times, either with cable end or cap.
• If you need to replace a probe get help.
Sonde Maintenance and Care
March 2014
Care continued
• To clean pH bulb or sonde body after longterm deployment you can soak entire
sonde in white vinegar.
Sonde Maintenance and Care
March 2014
DO Probes
• The DO probe requires that the KCl solution &
membrane be changed every 30 days when in use.
• The KCl solution & membrane will also need to be
replaced if:
- bubbles are present under the membrane;
- deposits of dried KCl are apparent on the o-ring or
membrane; or
- probe shows unstable reading or other problems.
• Temp sensor and membrane should be dry for
calibration.
Sonde Maintenance and Care
March 2014
D.O. Probe cont.
• If the silver electrodes (under the membrane)
become tarnished (black), they need a fine
sanding (2400 grit in maint kit). This must be
done correctly or the probe can be damaged.
• It is unlikely you will need to perform this task.
• If you feel you need to have this done, refer to
your manual for specifics or call for help.
Sonde Maintenance and Care
March 2014
Optical DO Probes
• For Optical DO probes, the ODO Gain in
cal constants should be .85 to 1.15
• Problems with wiper parking improperly is
due to a motor mount problem inside
probe. Turn off wiper in Advanced sensor
menu. Set Wipe Interval & # of wipes to 0.
Sonde Maintenance and Care
March 2014
Conductivity / Temp Probes
• Conductivity probe openings - clean with
small brush. Dip brush in clean water &
brush in and out 15 to 20 times & rinse.
• Can use a mild detergent.
• Temp probe requires no maintenance – just
keep it clean.
• Common problem for cond calibration – not
enough cal solution in cup.
Sonde Maintenance and Care
March 2014
pH Probe
• If you see deposits on the probe bulb or have a slow
response time, the pH probe needs cleaning.
• Use clean water and a soft clean cloth, cotton swab or
pipe cleaner to remove dirt from probe.
• Be careful not to wedge the swab between the bulb
and sensor guard. The glass bulb can break.
• If you need additional cleaning, refer to manual and or
contact one of us.
• Don’t let this probe dry out.
Sonde Maintenance and Care
March 2014
Long-term Storage
• Remove batteries from 650 display & any
6000 series sondes. Store at room temp &
away from moisture & heat.
• Keep the probes moist without immersing
them in liquid. YSI suggests al least .5
inch of water (any type will do) in the
calibration/storage cup.
Sonde Maintenance and Care
March 2014
Long-term Storage Continued
• Use enough water to provide 100% humidity,
but not enough to cover the probe surfaces.
• Make sure the storage vessel is sealed to
minimize evaporation.
• Check the vessel periodically to make certain
that water is still present.
Sonde Maintenance and Care
March 2014
Calibration Tips
• Calibrate in the order that the 650 displays the
parameters. DO requires that cond is calibrated.
Always do pH 7 before 10.
• Temp sensor needs to be in cal solution when
calibrating each of the probes.
• Always use “enter” during a probe calibration &
not “escape”. “Escape” will abort calibration.
Sonde Maintenance and Care
March 2014
Calibration Tips
• Always keep the cap on the cal std bottle.
• Probes that don’t stabilize quickly. Check:
1. Is the temp changing?
2. Is the probe dirty?
3. Cal constants out of range? Old probe?
4. Cal standard expired?
5. Enough cal standard in cal cup?
• Never accept an “out of range”. You should be
able to correct the problem unless probe is bad.
Sonde Maintenance and Care
March 2014
Calibration Tips - Conductivity
• Always calibrate in specific conductance.
• When entering the Conductivity Standard
enter 1.0 ms/cm & not the 1000 us/cm that’s
on the cal bottle. Different units.
Sonde Maintenance and Care
March 2014
D.O. Calibration Tips
• Don’t shake KCl solution for DO probe.
• Low DO charge - can indicate insufficient
or old KCl.
• High DO charge – recondition probe (sand
electrodes), replace membrane and burn it
in. If still high – repeat recondition process.
If still high – replace DO probe.
Sonde Maintenance and Care
March 2014
Optical D.O. Calibration Tips
• If you aren’t having problems with optical
DO membrane – don’t replace it. Each
membrane has it’s own cal coefficients. If
you change it, the coefficients needs to be
entered into the 650 display. Main menu >
calibrate > optical DO > view cal constant.
• Water under membrane & inside the o-ring
area needs to be dried out.
Sonde Maintenance and Care
March 2014
Turbidity Calibration Tips
• Turbidity readings that are negative are
due to calibrating the zero with distilled
water. Distilled water typically has .8 to 1.0
turbidity.
Sonde Maintenance and Care
March 2014
Summary
•
•
•
•
Keep the probes moist, but not immersed.
Don’t let it freeze or over heat in a vehicle.
Minimize rough play - banging into bridges, etc.
Keep moisture out of the probe ports and cable
connections.
• Inspect probes for bubbles (DO) & dirt or
fouling. Clean on a routine basis depending on
use.
Sonde Maintenance and Care
March 2014
Summary cont.
• Call to get help if needed.
• Proper maintenance and care of sonde
results in dependable equipment that will last
a long time.
• If your sonde is damaged or is acting up, let
us know right away so we can get you a
replacement probe or sonde.
Questions??
Sonde Maintenance and Care
March 2014
Lunch and Afternoon Schedule
• Split up group for the afternoon sessions
now.
• Keep an eye on the clock and make your
way to either the lab or this auditorium by
about 12:15.
• Those going to the lab right after lunch can
drop off their notebooks, sonde, etc in the
lab on the way to the cafeteria.
Sonde Maintenance and Care
March 2014
When You Get to the Lab
Find your sonde & take it to a work station.
Work as a team to:
1. Replace KCl and membrane, take turns.
2. Turn on handpad. Batteries in?
3. Calibrate sonde. Complete cal sheet.
4. Run 2 blinds and temp probe test &
complete and turn in paperwork.
Sonde Maintenance and Care
March 2014

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